Pretty sure the issue is that they were using the "DAT RAYCISS" argument in an attempt to derail the thread into endless semantics arguments and pedantry for weeks on end in the hopes of continually getting the thread rickshawed, and thus avoiding having to actually face the facts that Zimmerman wasn't some white supremacist who hunted down little black boys in the street, not the actual accusations of racism.
The accusations of racism were just a stupid tactic employed by idiots like Tanoomba to achieve their goal of making the thread impossible to have an actual conversation about the trial and the way the media handled the case, because that's all inconvenient to their world view. The reaction was just a really great way of countering their stupidity with more stupidity. Somehow you seem to have missed that.